1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * (C) COPYRIGHT 2018 ARM Limited. All rights reserved. 4 * Author: James.Qian.Wang <james.qian.wang@arm.com> 5 * 6 */ 7 #include <linux/io.h> 8 #include <linux/iommu.h> 9 #include <linux/of.h> 10 #include <linux/of_graph.h> 11 #include <linux/of_reserved_mem.h> 12 #include <linux/platform_device.h> 13 #include <linux/pm_runtime.h> 14 #include <linux/dma-mapping.h> 15 #include <linux/debugfs.h> 16 #include <linux/seq_file.h> 17 18 #include <drm/drm_print.h> 19 20 #include "komeda_dev.h" 21 22 static int komeda_register_show(struct seq_file *sf, void *x) 23 { 24 struct komeda_dev *mdev = sf->private; 25 int i; 26 27 seq_puts(sf, "\n====== Komeda register dump =========\n"); 28 29 pm_runtime_get_sync(mdev->dev); 30 31 if (mdev->funcs->dump_register) 32 mdev->funcs->dump_register(mdev, sf); 33 34 for (i = 0; i < mdev->n_pipelines; i++) 35 komeda_pipeline_dump_register(mdev->pipelines[i], sf); 36 37 pm_runtime_put(mdev->dev); 38 39 return 0; 40 } 41 42 DEFINE_SHOW_ATTRIBUTE(komeda_register); 43 44 static void komeda_debugfs_init(struct komeda_dev *mdev) 45 { 46 if (!debugfs_initialized()) 47 return; 48 49 mdev->debugfs_root = debugfs_create_dir("komeda", NULL); 50 debugfs_create_file("register", 0444, mdev->debugfs_root, 51 mdev, &komeda_register_fops); 52 debugfs_create_x16("err_verbosity", 0664, mdev->debugfs_root, 53 &mdev->err_verbosity); 54 } 55 56 static ssize_t 57 core_id_show(struct device *dev, struct device_attribute *attr, char *buf) 58 { 59 struct komeda_dev *mdev = dev_to_mdev(dev); 60 61 return sysfs_emit(buf, "0x%08x\n", mdev->chip.core_id); 62 } 63 static DEVICE_ATTR_RO(core_id); 64 65 static ssize_t 66 config_id_show(struct device *dev, struct device_attribute *attr, char *buf) 67 { 68 struct komeda_dev *mdev = dev_to_mdev(dev); 69 struct komeda_pipeline *pipe = mdev->pipelines[0]; 70 union komeda_config_id config_id; 71 int i; 72 73 memset(&config_id, 0, sizeof(config_id)); 74 75 config_id.max_line_sz = pipe->layers[0]->hsize_in.end; 76 config_id.n_pipelines = mdev->n_pipelines; 77 config_id.n_scalers = pipe->n_scalers; 78 config_id.n_layers = pipe->n_layers; 79 config_id.n_richs = 0; 80 for (i = 0; i < pipe->n_layers; i++) { 81 if (pipe->layers[i]->layer_type == KOMEDA_FMT_RICH_LAYER) 82 config_id.n_richs++; 83 } 84 return sysfs_emit(buf, "0x%08x\n", config_id.value); 85 } 86 static DEVICE_ATTR_RO(config_id); 87 88 static ssize_t 89 aclk_hz_show(struct device *dev, struct device_attribute *attr, char *buf) 90 { 91 struct komeda_dev *mdev = dev_to_mdev(dev); 92 93 return sysfs_emit(buf, "%lu\n", clk_get_rate(mdev->aclk)); 94 } 95 static DEVICE_ATTR_RO(aclk_hz); 96 97 static struct attribute *komeda_sysfs_entries[] = { 98 &dev_attr_core_id.attr, 99 &dev_attr_config_id.attr, 100 &dev_attr_aclk_hz.attr, 101 NULL, 102 }; 103 104 static struct attribute_group komeda_sysfs_attr_group = { 105 .attrs = komeda_sysfs_entries, 106 }; 107 108 static int komeda_parse_pipe_dt(struct komeda_pipeline *pipe) 109 { 110 struct device_node *np = pipe->of_node; 111 struct clk *clk; 112 113 clk = of_clk_get_by_name(np, "pxclk"); 114 if (IS_ERR(clk)) { 115 DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe->id); 116 return PTR_ERR(clk); 117 } 118 pipe->pxlclk = clk; 119 120 /* enum ports */ 121 pipe->of_output_links[0] = 122 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0); 123 pipe->of_output_links[1] = 124 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 1); 125 pipe->of_output_port = 126 of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT); 127 128 pipe->dual_link = pipe->of_output_links[0] && pipe->of_output_links[1]; 129 130 return 0; 131 } 132 133 static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev) 134 { 135 struct platform_device *pdev = to_platform_device(dev); 136 struct device_node *child, *np = dev->of_node; 137 struct komeda_pipeline *pipe; 138 u32 pipe_id = U32_MAX; 139 int ret = -1; 140 141 mdev->irq = platform_get_irq(pdev, 0); 142 if (mdev->irq < 0) { 143 DRM_ERROR("could not get IRQ number.\n"); 144 return mdev->irq; 145 } 146 147 /* Get the optional framebuffer memory resource */ 148 ret = of_reserved_mem_device_init(dev); 149 if (ret && ret != -ENODEV) 150 return ret; 151 152 for_each_available_child_of_node(np, child) { 153 if (of_node_name_eq(child, "pipeline")) { 154 of_property_read_u32(child, "reg", &pipe_id); 155 if (pipe_id >= mdev->n_pipelines) { 156 DRM_WARN("Skip the redundant DT node: pipeline-%u.\n", 157 pipe_id); 158 continue; 159 } 160 mdev->pipelines[pipe_id]->of_node = of_node_get(child); 161 } 162 } 163 164 for (pipe_id = 0; pipe_id < mdev->n_pipelines; pipe_id++) { 165 pipe = mdev->pipelines[pipe_id]; 166 167 if (!pipe->of_node) { 168 DRM_ERROR("Pipeline-%d doesn't have a DT node.\n", 169 pipe->id); 170 return -EINVAL; 171 } 172 ret = komeda_parse_pipe_dt(pipe); 173 if (ret) 174 return ret; 175 } 176 177 return 0; 178 } 179 180 struct komeda_dev *komeda_dev_create(struct device *dev) 181 { 182 struct platform_device *pdev = to_platform_device(dev); 183 komeda_identify_func komeda_identify; 184 struct komeda_dev *mdev; 185 int err = 0; 186 187 komeda_identify = of_device_get_match_data(dev); 188 if (!komeda_identify) 189 return ERR_PTR(-ENODEV); 190 191 mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL); 192 if (!mdev) 193 return ERR_PTR(-ENOMEM); 194 195 mutex_init(&mdev->lock); 196 197 mdev->dev = dev; 198 mdev->reg_base = devm_platform_ioremap_resource(pdev, 0); 199 if (IS_ERR(mdev->reg_base)) { 200 DRM_ERROR("Map register space failed.\n"); 201 err = PTR_ERR(mdev->reg_base); 202 mdev->reg_base = NULL; 203 goto err_cleanup; 204 } 205 206 mdev->aclk = devm_clk_get(dev, "aclk"); 207 if (IS_ERR(mdev->aclk)) { 208 DRM_ERROR("Get engine clk failed.\n"); 209 err = PTR_ERR(mdev->aclk); 210 mdev->aclk = NULL; 211 goto err_cleanup; 212 } 213 214 clk_prepare_enable(mdev->aclk); 215 216 mdev->funcs = komeda_identify(mdev->reg_base, &mdev->chip); 217 if (!mdev->funcs) { 218 DRM_ERROR("Failed to identify the HW.\n"); 219 err = -ENODEV; 220 goto disable_clk; 221 } 222 223 DRM_INFO("Found ARM Mali-D%x version r%dp%d\n", 224 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id), 225 MALIDP_CORE_ID_MAJOR(mdev->chip.core_id), 226 MALIDP_CORE_ID_MINOR(mdev->chip.core_id)); 227 228 mdev->funcs->init_format_table(mdev); 229 230 err = mdev->funcs->enum_resources(mdev); 231 if (err) { 232 DRM_ERROR("enumerate display resource failed.\n"); 233 goto disable_clk; 234 } 235 236 err = komeda_parse_dt(dev, mdev); 237 if (err) { 238 DRM_ERROR("parse device tree failed.\n"); 239 goto disable_clk; 240 } 241 242 err = komeda_assemble_pipelines(mdev); 243 if (err) { 244 DRM_ERROR("assemble display pipelines failed.\n"); 245 goto disable_clk; 246 } 247 248 dma_set_max_seg_size(dev, U32_MAX); 249 250 mdev->iommu = iommu_get_domain_for_dev(mdev->dev); 251 if (!mdev->iommu) 252 DRM_INFO("continue without IOMMU support!\n"); 253 254 clk_disable_unprepare(mdev->aclk); 255 256 err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group); 257 if (err) { 258 DRM_ERROR("create sysfs group failed.\n"); 259 goto err_cleanup; 260 } 261 262 mdev->err_verbosity = KOMEDA_DEV_PRINT_ERR_EVENTS; 263 264 komeda_debugfs_init(mdev); 265 266 return mdev; 267 268 disable_clk: 269 clk_disable_unprepare(mdev->aclk); 270 err_cleanup: 271 komeda_dev_destroy(mdev); 272 return ERR_PTR(err); 273 } 274 275 void komeda_dev_destroy(struct komeda_dev *mdev) 276 { 277 struct device *dev = mdev->dev; 278 const struct komeda_dev_funcs *funcs = mdev->funcs; 279 int i; 280 281 sysfs_remove_group(&dev->kobj, &komeda_sysfs_attr_group); 282 283 debugfs_remove_recursive(mdev->debugfs_root); 284 285 if (mdev->aclk) 286 clk_prepare_enable(mdev->aclk); 287 288 for (i = 0; i < mdev->n_pipelines; i++) { 289 komeda_pipeline_destroy(mdev, mdev->pipelines[i]); 290 mdev->pipelines[i] = NULL; 291 } 292 293 mdev->n_pipelines = 0; 294 295 of_reserved_mem_device_release(dev); 296 297 if (funcs && funcs->cleanup) 298 funcs->cleanup(mdev); 299 300 if (mdev->reg_base) { 301 devm_iounmap(dev, mdev->reg_base); 302 mdev->reg_base = NULL; 303 } 304 305 if (mdev->aclk) { 306 clk_disable_unprepare(mdev->aclk); 307 devm_clk_put(dev, mdev->aclk); 308 mdev->aclk = NULL; 309 } 310 311 devm_kfree(dev, mdev); 312 } 313 314 int komeda_dev_resume(struct komeda_dev *mdev) 315 { 316 clk_prepare_enable(mdev->aclk); 317 318 mdev->funcs->enable_irq(mdev); 319 320 if (mdev->iommu && mdev->funcs->connect_iommu) 321 if (mdev->funcs->connect_iommu(mdev)) 322 DRM_ERROR("connect iommu failed.\n"); 323 324 return 0; 325 } 326 327 int komeda_dev_suspend(struct komeda_dev *mdev) 328 { 329 if (mdev->iommu && mdev->funcs->disconnect_iommu) 330 if (mdev->funcs->disconnect_iommu(mdev)) 331 DRM_ERROR("disconnect iommu failed.\n"); 332 333 mdev->funcs->disable_irq(mdev); 334 335 clk_disable_unprepare(mdev->aclk); 336 337 return 0; 338 } 339